23 '28 Proceedings of the Royal Irish Academy. 



in the western division of the island. Without doubt, it will he found 

 in other places on the cliffs, and in the neighbourhood of Kildawnet. The 

 specimens taken near Lough Nakeeroge were large, flat, and very fragile ; 

 and in general appearance they were very similar to many of the shells 

 taken in 1910, on Tory Island in Donegal. 1 On the warren at Lough 

 Xarabrack a fair number of the var. eitrinozonaia were taken. Want of 

 shelter, the shifting of the sands, and the increase of peat are perhaps 

 the main causes acting towards the extermination of this and other 

 shells on Achill, and indeed on many of the other islands. 

 [H. hortensis Mull. — ? X. " Occurred with H. nemoralis, with a similar band 

 formula." — J. G. Milne. This is undoubtedly an error of determination, 

 as I have previously pointed out. The white-lipped form of H. nemoralis, 

 which is found on Achill, must have been mistaken by Milne for this 

 species.] 

 CocMicopa lubrica Mull. — X.S.W. Generally distributed: but absent from 

 the extremely peaty areas. 

 *Pupa anglica Fer. — X.W. Common on the cliffs at Dugort and near the 



eastern Lough Xakeeroge. 

 P. cylindracea Da Costa. — N.S.W. Generally distributed. 

 Vertigo antivertigo Drap. — X. Frequent in the Keel and Dugort neighbour- 

 hoods. 

 V. substriata Jeffreys. — N. " Dugort, in the fields of the Colony." — J. G. 

 Milne. Xot seen by me on any of my visits, though probably frequent 

 along the northern cliffs. 

 V. pygmaea Drap. — X. Frequent. 



Clausula bidentata Strom. —X.W. J. G. "Milne considered that this shell 

 " had vanished from Achill with the trees, and that it now stopped 

 where the trees stop, at Mulranny." ClausUia bidentata, however, still 

 flourishes on the cliffs, close to Dugort ; while it is also common on the 

 cliffs at the eastern Lough Xakeeroge. 

 [Succinea putris L. — \ X. The shells recorded as this species by J. G. Milne 

 from Dugort and Keel must have been our western form of »S'. pfeifferi, 

 which has so often been mistaken for a small form of <S'. putris by 

 English conchologists.] 

 S. pfeifferi Eossm. — X. Frequent by the lake-shores and in marshy 



places. 

 Carychium mininrnm Mull — X.S.W. Common everywhere off the peaty 

 land. 



1 Irish >~at., Sept. 1910. 



